Expansion joint for concrete roads



EXPANSION JOINT FOR CONCRETE ROADS Original Filed Sept. 4, 1924 INVENTOR;

ibe/"Z p 14 I TTORNEYS pansion joint on an as Patented I Apr. 18, 1933 ALBERT C. FISCHER, OF CHICAGO, ILLINOIS, ASSIGNOR,

THE PHILIP CAREY MANUFACTURING COMPANY,

BY MESN'E ASSIGNMENTS, TO A CORPORATION OF OHIO EXPANSION JOINT FOB CONCRETE ROADS Application filed September 4, 1924, Serial No. 735,927. Renewed March 20, 1981..

Heretofore it has been customary to manufacture expansion joints by building up in alternate layers felt and asphalt mastic; also it has been customary to manufacture an exhaltic mastic center and felt sides. The fe t'has been depended upon for a stifl'ening means and rigidity, causing the expansion joint to be rigid vertically and horizontally.

My invention relates primarily to a structure which is flexible horizontally and rigid vertically. It has been customary'inrolhng steel to press out the ingots between pressure rolls, elongating them into long strands. Likewise asphalt in fiat strips one or two inches in thickness and several inches in width, when'in a plastic, rubbery condition, under the same treatment, will elongate along the lines of its length and will vary little, if any, in the width, so that a strip of asphalt, several inches thick and several feet in length when reduced in thickness to approximately one-quarter or half an inch in thickness, will elongate to three or four times the number I of feet in length. When a paper surfacing,

saturated felt, dried felt, wood veneer and i like materials are placed either in the center or on the sides and surrounded by asphalt or allowed to be exposed on the surface, is placed on a one or two inch thickness and pressed between rolls, the fibrous matter or covering being of a semi-rigid structure break apart when the asphalt is pressed to a thinner dimension, because the plastic matter presses out and elongates and the rigid matter, due to adhesion, break transversely into narrow sections by reason of'the pressure and the non-plastic condition'of the fibrous material. Thus, if a paper or flat sheet of any like material is placed on the side of an asphaltic body in a thin layer, the elongation process would break apart the layer because of its plastic condition, and there would appear upon the length of the joint numerous strips transversely to the length which would be pressed into it or covered by other asphalt forced over it under pressure. It is this feature which I claim to be new and which involves a process heretofore not practiced, and which must therefore thicker than the wouldlikewise preserve the fibrous material in an unpenetrated state, thus making a stiffphalt body and subdivide the fibrous matter into spaced strips.

Figures 3 and 4 illustrate, by edge and perspective views, an application of the invention in which the fibrous matter is located interiorly of the bituminous body; Figure 3 showing the condition before elongation; and Figure 4 after elongation.

Figures 5 and 6 are face views showing an application of the invention similar to that involved in Figures 1 and 2: Figure 6 illustrating the condition of the fibrous material after elongation of the asphaltic body.

Figure 7 shows in perspective an efiect similar to that shown in Figure 6, but existing on both sides of the body.

Figure 8 illustrates one method of treating a bodv such as illustrated in Figure 5 to produce the effect of Figure 6: and Figure 9 shows the efiect thus produced; and

Figure 10 illustrates a form of apparatus for preparing the fibrous matter for application to the asphaltic body.

To better illustrate mv invention I refer to the drawing. in detail Fig. 1 represents a strip of asphalt having upon its surface a de ired that the fibrous matter break apart.

Fi 2 illustrates the transverse section .of

th s fibrous matter, in which a'representsthe,

fibrous material and b: the scoring along which it is desired that the fibrous matter break.

Fig. 3 illustrates this fibrous matter with scorings placed between two layers of asphalt, in which a represents the fibrousmatter, b the scorings or grain, and 0' the asphaltic material. This body structure: would; be desired ultimate size of the joint required and when placed between presa stiffening means vertically as the break is scored transversely tothe length of the joint.

Fig. illustrates a wood veneer sheet showing the grain transversely of the length thereof, which when treated to the process indicated would cause breakage along the 9 over or under asphalticmaterial grain transverse] of the lien h thereof; a represents the fi rous materlal and b the scorings or markings of the fibrous material when pressed apart by having a .plastic body it which would cause: a separation of these transverse segments along the lines of the grain and cause a formation as in Fig. 6, in which a re resents the fibrous segments broken afiplart, aving the plastic ling the spaces between 7 them.

Fig. 7 illustrates how a suitable layer of fibrou matter might be inherently constructed in an asphaltic mass and built up in a treelikeformation of flaky material in thin laminae or leaves, making it a more rigid structure than illustrated in Fig. 4; 0 represents the asphaltic-mass and a the fibrous material in double layer formation.

Fig. 8 illustrates the process of forcing a heavy bituminous strip embodying the sheet as shown in Fig. 2, in the process of going through pressure rolls, d, and the result shown to the right of the rolls, in which 0 1 represents the p a'stic bituminous mass and a the fibrousmaterial divided in the asphaltic mass.

Fig. 9 illustrates this plastic-bituminous mass after it has passed through the rolls, 5 having a final coatin upon the upper surface, and how it woul appear if pressed between the rolls.

Fig. 10 illustrates the process of running a veneer sheet through a series of saturating 0 tanks over rolls as at e, into the'tank as at f and gathering asphalt as at c in order to build up the body structure by repeated immersions and cooling and finally pressing through rolls as at d.

It can readily be appreciated that dividing up fibrous material of increased rigidity would increasefthe rigidit of thestructure, and inasmuch as it woul require a veneer thickness from one-sixteenth to one-eighth of an inch to give adequate strength, it would be most likely that this structure would remain unsaturated, even'thou h it was immersed momentarily in .ahot Eath of molten asphalt. This would brin the invention in previous applications for tters Patent in which various cellular matter has been shown to be incorporated in an as haltic mass as a stlfiening means. I there ore do not wishto be limited in the use of materials as a strengthening means in the bod structure as some very thin materials whic erly scored may be readily forced apart under pressure as outlined; and even a metal sheet, if properly scored and previously weakened along the seam, might readily be are propbroken apart 'and accomplish the purpose herein intended.

The bituminous material required would of necessity be blown asphalt in order to secure the rubber condition required for expansion joint of this kind. However, other com itions might be-. introduced which wou d not affect the construction or process herein described.

I claim:

1. An expansion joint strip comprisin a body of bituminous comfosition provi ed with separable thin reen orcing strips embedded in the surface of the bituminous body.

2. An expansion joint strip comprising a body of bituminous composition provlded with disjoined thin reenforcing stri s embedded in spaced'relation in the sur ace of the bituminous strip.

3. An expansion joint strip, comprisin I,

body of bituminous composition provi ed with disjoined thin wooden strips embedded in the surface of the bituminous body. 4. An expansion joint strip comprisin a body of bituminous composition provi ed with thin wooden strips embedded in spaced relation in the surface of the bituminous 5. An expansion joint strip comprising a body of bituminous composition provi ed with separable thin reenforcing strips embedded in both faces of the bituminous body. 6. An expansion joint strip comprising a body of bituminous composition provided with disjoined thin wooden strips embedded in both faces of the bituminous body.

7. An expansion joint strip comprising a body of bituminous composition provided with disjoined thin reenforcing strips embedded in spaced .relation in both faces of the bituminous body.

8. An expansion joint strip comprising a body of bituminous compound provided with thin wooden strips embedded in spaced relation in both faces of the bituminous body.

9. A process for fabricating reenforced ex pansion jointstrips of bituminous composition characterized by facing a bituminous base sheet with a thin reenforcing cover sheet, scoring the cover sheet transversely at intervals, and rolling the composite structure to' separate he cover sheet into individi ual slats and embed them inthe surface of the bituminous base sheet.

10. A process for fabricating reenforced expansion joint strips of bituminous com position characterized by facmg a 'bltuminous base sheet on both faces with thin reenforcing cover sheets, scoring the cover sheets transversely at intervals, and rolling the composite structure to separate the cover sheets into individual slats and embed them in the surface of the bituminous base sheet.

11. A process for fabricating reenforced expansion joint strips of bituminous composition characterized by facing a bituminous base sheet with a thin Wooden cover sheet, scoring the cover sheet transversely at intervals, and rolling the composite structure to separate the coversheet into individual slats and embed them in the surface of the bituminous base sheet.

12. A process for fabricating reenforced expansion joint strips of bituminous composition characterized by facing a bituminous base sheet on both faces with thin wooden cover sheets, scoring the cover sheets transversely at intervals, and rolling the composite structure to separate the cover sheets into individual slats and embed them in the surface of the bituminous base sheet.

13. A process for fabricating reenforced expansion joint strips of bituminous composition characterized by adhering a thin reenforcing sheet to a bituminous base to produce a laminated structure, and rolling the laminated structure to separate transverselythe thin reenforcing sheet into individual slats. r

The foregoing specification signed at Chicago, Illinols, this 6th day of Februa 1925. ALBERT O. FISC R. 

